On a mild and cloudy evening in Izmit, western Turkey, a Panamanian-flagged tanker called the Bela 6 dropped anchor and began pumping nearly 100,000 tons of Russian oil. The January 6 delivery was an outlier for the refinery’s owner, Tupras, which cut Russian crude imports by 69 percent the previous month, ahead of an EU sanction taking effect on January 21, according to data from the Center for Research on Energy and Clean Air (CREA). The new measure bans imports into the European Union of products derived from Russian crude oil and is the…